Unit 2 Stars and Galaxies

Process of a star combining its core elements into something bigger is called

The Milky Way and Andromeda are both

Luminosity is the measure of __________in a star, commonly known as how bright the star is.

Combining of lightweight nuclei into heavier nuclei, such as hydrogen combining to form helium

Recent observations show that the rate of expansion of the universe is

Two stars gravitationaly bound to each other is said to be a binary system.

We cannot view the same constellations throughout the year because

A supernova occurs 10,000 light-years from Earth. When will the event be witnessed on Earth?

cloud of interstellar gas and dust

group of bright stars named after an animal, mythological character

The approximate temperature of our sun is

An average star takes ______ to use up its Hydrogen and go from main sequence star to red giant

There are over 88 patterns of stars called __________________ in the night sky.

When a star reaches 10 million K this process becomes possible.

Disk shaped swirling gas with hot center reaching temps close to 10 million K

The 40 galaxies closest to the Milky Way

Cosmology is the study of

The Milky Way Galaxy is assumed to be how far across?

What constellation has the "Big Dipper" in it?

A white dwarf star is ____________________.

Stars more massive that the sun use up their fuel at a slower rate.

Galaxy clusters larger than the Local Group might have hundreds or thousands of members and have diameters from

Red-shift is used as evidence that the universe is contracting.(shrinking)

Know the different paths of (Small mass, large mass, and VERY large mass stars)

Small,massive,dense object that has a gravity so immense that nothing-not even light-can escape

When a very supermassive large star becomes a supernova, this is the next step to a

Galaxies that do not have a shape are referred to as

When you look at star light, you are looking back in time because

Section of the H-R diagram into which 90% of stars fit into

Apparent magnitude measures the brightness of a star as it can be seen from

A cloud of interstellar gas and dust that swirls around to form a star

The apparent shift in position of a star due to the motion of the observer is called _________.